Drawing instrument



C. A. GREEN AND H. F. SCHUH.

DRAWING INSTRUMENT.

APPLICATION FILED OCT. 16, 1920.

1,411,491. PatentedApr. 4, 1922.

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C. A. GREEN AND H. F. SCHUH.

DRAWING INSTRUMENT. APPLICATION FILED OCT. 16. 1920- 1 1,411,491Patented Apr. 4, 1922.

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45 v instrument to be arranged at right angles UNITED STATES serumOFFICE.

CHARLES A, GREEN AND HENRY F. SOI'IUH, OF CHICAGO, ILLINOIS, ASSIGNORSTO THE C. F. PEASE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OFILLINOIS.

DRAWING INSTRUMENT.

Specification of Letters Patent. Patented Apr. 4, 1922 Application filedOctober'lG, 1920. Serial No. 417,365.

To all whom it may concern."

Be it known that we, CHARLES A. GREEN and HENRY F. SCHUH, citizens ofthe United States, residing at Chicago, in the county of (look and Stateof Illinois, have invented certain new and useful Improvements inDrawing Instruments, of which the following is a specification.

This invention relate to drawing instruments,"and it comprises a divideror com pass having one leg provided with a slot, a member adapted to beinserted therein, a flattened pin arranged transversely of said slot,the inserted member being provided with a transverse slot having anenlarged head adapted to receive said pin.

In the usualconstruction of drawing instruments, the needle bar, pencompass, or pencil holder bar is inserted in a socket in the leg of theinstrument, whereby the inserted member may be removed and replaced byanother member when the instrument is to be used for a differentpurpose. The inserted member isfurther provided with a slottedconnection or joint, whereby the lower end may be arranged atsubstantially right angles to the paper or'surface on which theinstrument is being used.

In the present invention, we have pro vided' an improved drawinginstrument wherein the end of the leg of the instrument is provided witha slot arranged longitudinally-and adapted to receive the reduced innerend of the needle bar, pen compass or pencil bar holder. The end of theinserted member is provided with a transverse slot adapted to receive aflattened pin fixed in the end of the leg and arranged transversely ofthe slot therein. The transverse slot in the reduced end-of the insertedmember is preferably in the form of a bayonet slot, having an enlargedhead to receive the p n, whereby the inserted member, when in normalposition, may be arranged at an angle to the leg to permit the workingend of the to the-paper or surface. To remove the inserted member fromthe leg, it is turned to aposition at substantially right angles to theleg of the instrument to arrange the smaller diameter of the screwtransversely in the slot in the inserted member and permit the insertedmember to be removed from the leg of the instrument.

In the accompanying drawings, we have shown one embodiment of theinvention. In this showing:

Figure l is a plan view of the instrument showing a needle bar attachedto each leg,

Figure 2 is a side elevation thereof,

Figure 3 is a plan view of one of the needle bars,

Figure 4 is a side elevation thereof,

Figure 5 is a side elevation of the needle bar provided with a bayonetslot,

Figure 6 is a plan view thereof,

Figure 7 isa transverse sectional view of the instrument shown inFigures 1 and 2, 1 Figure 8 is a plan view of a lengthening oar,

' Figure 9 is a side elevation thereof,

Figure 10 is a plan view of the compass pen, adapted to be employed inconnection with the invention, 7

Figure 11 is a side elevation thereof,

Figure 12 is a plan view of the pencil holder bar,

Figure 18 is a side elevation thereof,

Figure 14 is a plan view of the pencil holder complete, and,

Figure 15 is a side elevation thereof.

Referring to Figures 1 to 7 of the drawings, the invention comprises apair of legs 1 and 2. These legs are connected to a yoke 3, at one end,having a finger piece or handle The legs are secured to the yoke bymeans of a pin or screw 5, passing through openings in the'yokeand inthe endsof the legs. A nut 6 may be provided to retain them in position.The legs are mounted in the yoke to permit adjustment thereof, wherebythe distance between the legs may be varied as is usual in instrumentsof this character. The lower end of the leg 2 is provided with a slot 3'for the reception of the end ofa needle bar 4'. 1 is shown in detailinFigures 3 and 4 of the drawings. As shown, it is provided with areduced end 5, adapted to be arranged in the slot and is provided withan openingfi for the reception of a screw 7, passing through openings inthe leg and throughthe opening 6. This member is attached permanently tothe instrument. It, of course, may be withdrawn if desired, by entirelyre The needle bar i moving the pin or screw 7, but its attachment iscomparatively permanent, in that a vide one detachable member as theinstrument includes-one needle pin whether em ployed as apen or pencilcompass or as a divider. As shown, a needle point 8 is arranged in theend of this member, and is When employed as a pair of dividers,1the.

medlnihiolder. shownrin Figures 5 and, (Sis used Referring to thesefigures of. the.

drawings, h the needle bar .comprises a body portion 12;havingareducedend 13, adapted to be arranged in the slot 11. As. shown,

the member is-provided. with a transverse slams havingan enlargedlhead15. When, the needle bar isgarrangecl in position, apin.

16 is arrangedin. openings at eachrsideof theislot. ant :passedthroughthe head 15-of messiah. As shown, the'pin isprovided withflattenedportions 17 arranged opposite each other. The larger diameterof the pin 'iS substantiallyythe same as theqdiameter of tlwihead0f1the-slotl5. The pin .is arranged in thafixedipositionshown in Figure7 of the drawings. To remove the detachable member; the, member isturned 90 degrees, wiherebythe reduced width .ofithepinns: arrangedtransversely of the slot amithe pin is capable-of moving tliroughthebody portinnaof the slot. The pin is providedwith a nut 18 (see Fi ure2), wherebyit isaree. tainedin adjnste pos tion, To remQVQ thedetachable needle bfllythfi; nut 18 =is loosened and the member12turnedatright angles to thiaposition shown in Figure 7 of the drawingn. The. needle bar may thenbe removed frbmi the, side. of' theinstrument, the pin passing through the slot 14.. The. detach:

alilei needle bar is-provided with; a needle pointrlflg retained thereinin theusual mam nertasibythreaded pin 20 and IIUtQlA ImFiguresIS-and 90i the drawings, We have Shawna lengtheningbar 22, providedwithiarednced end 23, adapted totbe. re-

ceived inthie "slot of the leg in the manner justdieseribedu Thisreduced portion is pro.-

vided fwith 1 a? transverse slot; 24, havingan enlarged head 25. Theopposite'endof the len heningbarisprovided with a longitu inal slot 26similar to'the.-s1ot 1 1 for the receptioneofia detaehable needle baror&

detachable pen compass or pencillholdierito bedscribedi Asshown, it isPI'OVldBd'IWilZh openings 27 and '28,. arranged on .each'side ot thaslot adapted to receive the-flattened pin :16. i l i The pen compassemployed in connection with ourinvention is shown in FignreslO artdll"of the. drawings. As shown, itmonrprises abody portion 29oftheusual;.:con-

. structionhaving' a reduced endr3fl ladapted to be arranged in theslotof theleg or the portion 33; having .9. reduce slot of the lengtheningbar. The reduced portion is provided with atranswmo slbt 31having-an-enlarged hisad: 32;-

Referring to Figures 12to 15 of the drawings, the pencil holder employedin connection with the invention comprises a body end 34m. slot35having. an enlarged head 36 is arran ed in the reduced end of thepencil hol er. The penoihholderban isproviided with a socket 37, atitsoppositeend for the reception of the pencil member 38, and: adapted toreceivea pieceof lead theilead: being held-therein .by athneaded'membenw.

The operation of theinvention will bq:

readily; understood i n hfii fQm89 i d rr scription. When the.instrument is changed from a divider to a, pen or peppil compass, orfroma. pen or pencilcompass,

to adivider, the nut-18 is loosenedand-thfi member, 12 turned at. right;angles. Thade-.. tachable member-i. then, may be readily. rm moved. andanother substituted,- Ifadepgthe eningbaris to beused, ittissecured to;it end of the leg: and; the detachable mg y arranged in the othenendofthe lengthening bar... It Jw-ill be. apparent.v thatr thee ment willpermit ready changeaocftthn dq taehable members as thapin doesrnot hagqtotbe entirely removedto removmthaidm tachable member.

It, will be. apparent that the. cont struction.notoinly provides mennsifon awoneinserted m mber ithm;

bntzthat it furtherv provides meansj whemhyi the working end offtheinstrument arranged at. right angles to the, pappr, loosening nut- 18,ithe needle bar, pen cognpass or pencil barholden may be tnrnedtat anangle to the leg 1 and tha nntthent' shed; the. needle bar, pencompasgwor. w i bar holder. being held in adjusted ippsit L by frictionbetween the reduced end-51 the sides ofathe slot in the leg I It is tobe. understood. that the form our invention herewith shown andis-tobetaken asapreferredexampletof i a same, and :that variouschangpszin tho Shim size. and. arrangement of parts v naypbe r01sortedto without departing from .thespirit of the invention or thescopetotithesub joined icla-ims.

Having thus described our inventions we claim: i r r 1. An instrument ofthe character dee scribed, comprising a .pair. of pivoted. doggy aneedle bar-mounted in the enidzof nmof said lens, .the end of i theother .leg;be'ng slotted longitudinally aidetachahle m w y A arranged:in saidslot, said memben-iboing provided with a transverse slot ext ndinfrom onesidesubstantiallytothecenter; and fastening means carried: bylegi ami adapted to enter saidtmnsverse islet V 2. An instrument of thecharacter described, comprising a pair of pivoted legs, a needle barmounted in the end of one of said legs, the end of the other leg beingslotted longitudinally, a detachable member having a reduced end, thereduced end thereof being provided with a transverse slot extending fromone side substantially to the center and being adapted to be arranged inthe slot in the end of said leg, and fastening means carried by said legand entering said transverse slot.

3, An instrument of the character described, comprising a Ipair ofpivoted legs, a needle bar mountec in the end of one of said legs, theend of the other leg being slotted longitudinally, a detachable memberarranged in said slot, said member being provided with a transverse slothaving an enlarged head, and fastening means carried by said leg andadapted to enter the head of the slot when the detachable memher isassembled, said fastening member being adapted to be arranged in oneposition to permit removal of the detachable member.

4. An instrument of the character described, comprising a pair ofpivoted legs, a needle bar mounted in the end of one of said legs, theend of the other leg being slotted longitudinally, a detachable memberhaving a reduced end adapted to be arranged in said slot, said reducedend being provided with a transverse slot having an enlarged head, and apin carried by said leg and adapted to enter said transverse slot, saidpin being flattened on opposite sides to permit it to pass through thereduced portion of the slot, and being adapted to be turned at rightangles when it is positioned in the enlarged head of said transverseslot to prevent the removal of the detachable member.

In testimony whereof we aifix our signatures in presence of twowitnesses.

CHARLES A. GREEN. HENRY F. SCHUH.

Witnesses: Y

C. F. PnAsn, W. E. TIMMERMAN.

